Individualize. Mild: initially 2mg three times daily, may subsequently increase to 15mg/day. Severe: initially 5mg twice daily. Usual optimal dose: 20–30mg daily; if needed, may increase to max 60mg/day.
Circulatory collapse. Coma. CNS depression. Blood dyscrasias.
Elderly (not for dementia-related psychosis; may increase risk of death). History of convulsive disorders or alcohol withdrawal. Exposure to extreme heat. Cardiovascular disease. Pre-existing low WBC or history of drug induced leukopenia/neutropenia; monitor CBCs during 1st few months of treatment. If significant neutropenia occurs; monitor for fever and signs of infections; discontinue if ANC<1000/mm3. Hepatic impairment. Neonates: risk of extrapyramidal and/or withdrawal symptoms post delivery (due to exposure during 3rd-trimester pregnancy). Pregnancy.
Additive effects with hypotensive agents, CNS depressants and alcohol. Potentiates barbiturates. Antagonized by carbamazepine. Caution with concomitant atropine or related drugs.
Tardive dyskinesia, hypotension, drowsiness, insomnia, jaundice, blood dyscrasias, may mask emetic signs of overdosage or disease, lowered seizure threshold, rash, photosensitivity, hyperprolactinemia, anticholinergic effects, pigmentary retinopathy, lenticular pigmentation, extrapyramidal reactions, neuroleptic malignant syndrome (monitor).